Digital anti-counterfeiting software method and apparatus

• US 7,796,753 B2
• Filed: 12/29/2004
• Issued: 09/14/2010
• Est. Priority Date: 11/29/1995
• Status: Expired due to Fees

• Current Assignee: Graphic Security Systems Corporation
• Original Assignee: Graphic Security Systems Corporation
• Inventors: Alasia, Thomas C., Alasia, Alfred V., Alasia, Alfred J.
• Primary Examiner(s): Korzuch, William R
• Assistant Examiner(s): Wright, Bryan
• Application Number:
  US11/025,531
• Publication Number:
  US 20050123134A1
• Time in Patent Office: 2,085 Days
• Field of Search: 380/51
• US Class Current: 380/51
• CPC Class Codes: H04N 1/448 Rendering the image unintelligible, e.g. scrambling
• CPC Class Codes: H04N 1/4486 using digital data encryption
• CPC Class Codes: H04N 1/4493 Subsequently rendering the image intelligible using a co-operating image, mask or the like
• CPC Class Codes: Y10S 283/901 Concealed data

Abstract

This invention relates generally to a method and apparatus, as implemented by a software program on a computer system, for digitally producing counterfeit-deterring scrambled or encoded indicia images. This method and system are capable of combining a source image with a latent image so the scrambled latent image is visible only when viewed through a special decoder lens. The digital processing allows different latent images to be encoded according to different parameters. Additionally, latent images might be encoded into single component colors of an original visible image, at various angles from each other.

Claims

1. An automated method for digitally encoding an image using a data processor, the method comprising:

providing a first digitized input image;

dividing the first digitized input image into a number of elemental input image segments each having an input segment length dimension and a common input segment width dimension sized so that the number of elemental input image segments per inch is equal to or a multiple of a decoder lens frequency;

resizing the elemental input image segments to form corresponding output image segments each having an output segment length dimension equal to the length dimension of the corresponding input segment and a common width dimension that is a function of the input segment width dimension and a scrambling factor, the output segment being resized about a lengthwise segment centerline; and

forming a first encoded output image from the output image segments, the first encoded output image being configured so that the output image segments retain a number of output image segments per inch that is equal to the number of elemental input image segments per inch and so that if the first encoded output image is printed, the first digitized input image can be discerned by viewing the printed encoded output image through a lenticular lens having the decoder lens frequency.

2. An automated method according to claim 1 further comprising:

rasterizing a source image into source image segments having a rasterization frequency equal to the number of elemental input image segments per inch; and

reforming the rasterized source image segments according to a pattern of the encoded output image to form a revised source image having the encoded output image embedded therein.

3. A automated method according to claim 2 further comprising:

printing the revised source image with sufficient resolution so that the input image may be discerned by viewing the revised source image through a lenticular lens having the decoder lens frequency.

4. A automated method according to claim 1 wherein the scrambling factor is an input parameter specified by a user of the automated method.

5. A automated method according to claim 1 further comprising:

flipping each output image segment 180 degrees about its lengthwise centerline.

6. A automated method according to claim 1 further comprising:

providing a second digitized input image;

repeating the steps of dividing, resizing and forming using the second digitized input image to produce a second encoded output image configured so that if the second encoded output image is printed, the second input image can be discerned by viewing the printed second encoded output image through a lenticular lens having the decoder lens frequency;

raster;

zing a source image into source image segments having a rasterization frequency equal to the number of elemental input image segments per inch;

dividing the source image segments in half to produce odd and even subsegments; and

reforming the source image segments to form a revised source image in which the odd rasterized source image segments are reformed according to a pattern of the first encoded output image and the even rasterized source image segments are reformed according to a pattern of the second encoded output image.

7. A automated method according to claim 1 wherein a ratio of the output segment width dimension to the input segment width dimension is proportional to the scrambling factor.

8. A automated method according to claim 7 wherein the scrambling factor is greater than or equal to 1.0.

9. An automated method for digitally encoding and embedding digital images into a source image using a data processor, the method comprising:

providing a first digitized input image;

dividing the first digitized input image into a number of elemental image segments each having an input segment length dimension and an input width dimension, the number of elemental image segments being established so that the number of image segments per inch is equal to or a multiple of a decoder lens frequency;

assembling the elemental image segments to form an output image retaining the number of image segments per inch that is equal to or a multiple of the decoder lens frequency;

rasterizing a source image into source image segments having a rasterization frequency equal to the number of image segments per inch that is equal to or a multiple of the decoder lens frequency; and

reforming the rasterized source image segments according to a pattern of the output image to form a revised source image having the output image embedded therein.

10. An automated method according to claim 9 further comprising:

resizing the elemental image segments so that each image segment has an output segment length dimension equal to the input segment length dimension and a common width dimension that is a function of the input segment width dimension and a scrambling factor, the elemental image segment being resized about a lengthwise segment centerline.

11. A automated method according to claim 10 wherein a ratio of the output segment width dimension to the input segment width dimension is proportional to the scrambling factor.

12. A automated method according to claim 11 wherein the scrambling factor is greater than or equal to 1.0.

13. A automated method according to claim 9 further comprising:

printing the revised source image with sufficient resolution so that the input image may be discerned by viewing the revised source image through a lenticular lens having the decoder lens frequency.

14. A automated method according to claim 9 wherein the scrambling factor is an input parameter specified by a user of the automated method.

15. A automated method according to claim 9 further comprising:

flipping each elemental image segment 180 degrees about its lengthwise centerline.

16. A computer-readable medium having software code stored thereon, the software code being configured to cause a computer to execute a method for digitally encoding an image, the method comprising:

receiving a first digitized input image;

dividing the first digitized input image into a number of elemental input image segments each having an input segment length dimension and a common input segment width dimension sized so that the number of elemental input image segments per inch is equal to or a multiple of a decoder lens frequency;

resizing the elemental input image segments to form corresponding output image segments each having an out put segment length dimension equal to the length dimension of the corresponding input segment and a common width dimension that is a function of the input segment width dimension and a scrambling factor, the output segment being resized about a lengthwise segment centerline; and

forming a first encoded output image from the output image segments, the first encoded output image being configured so that the output image segments retain a number of output image segments per inch that is equal to the number of elemental input image segments per inch and so that if the first encoded output image is printed, the first digitized input image can be discerned by viewing the printed encoded output image through a lenticular lens having the decoder lens frequency.

17. A computer-readable medium according to claim 16 wherein the method further comprises:

rasterizing a source image into source image segments having a rasterization frequency equal to the number of elemental input image segments per inch; and

reforming the rasterized source image segments according to a pattern of the encoded output image to form a revised source image having the encoded output image embedded therein.

18. A computer-readable medium according to claim 16 wherein the scrambling factor is an input parameter specified by a user of the software code.

19. A computer-readable medium according to claim 16 wherein the method further comprises:

flipping each output image segment 180 degrees about its lengthwise centerline.

20. An automated method for digitally encoding and embedding digital images into a source image using a data processor, the method comprising:

rasterizing a source image into source image elements having a rasterization frequency that is equal to or a multiple of a decoder lens frequency, the source image elements combining to form a rasterized source image;

providing a first digitized input image; and

applying an encoding algorithm to merge the first digitized image with the rasterized source image to produce a rasterized visible image with visible image elements having the rasterization frequency that is equal to or a multiple of the decoder lens frequency and an encoded latent image embedded therein, the encoded latent image being decodable by a decoding lens configured with the decoder lens frequency so as to reveal the first digitized input image when the rasterized source image is viewed through the decoding lens.

21. An automated method according to claim 20 wherein the source image elements are formed as regularly spaced line segments.

22. An automated method according to claim 20 wherein the source image elements are formed as a regularly spaced two dimensional array of non-linear shapes.

25. An automated method according to claim 20 further comprising:

printing the rasterized visible image with sufficient resolution so that the first digitized input image may be revealed by viewing the rasterized source image through a decoding lens having the decoder lens frequency.

23. An automated method for digitally encoding and embedding digital images into a digital color source image using a data processor, the method comprising:

dividing the digital color source image into a plurality of component color plates;

rasterizing a first component color plate into a first set of image elements having a first rasterization frequency that is equal to or a multiple of a first decoder lens frequency, the first set of image elements combining to form a rasterized first component color plate;

providing a first digitized input image;

applying an encoding algorithm to merge the first digitized image with the rasterized first component color plate to provide a first encoded component color plate with first plate image elements having the first rasterization frequency that is equal to or a multiple of the first decoder lens frequency and a first encoded latent image embedded therein, the first encoded latent image being decodable by a decoding lens configured with the first decoder lens frequency so as to reveal the first digitized input image when the first encoded component color plate is viewed through the first decoding lens; and

merging the first encoded component color plate with at least one of the other component color plates to form an output color image.

24. An automated method according to claim 23 further comprising:

rasterizing a second component color plate into a second set of image elements having a second rasterization frequency that is equal to or a multiple of a second decoder lens frequency, the second set of image elements combining to form a rasterized second component color plate;

providing a second digitized input image; and

applying the encoding algorithm to merge the second digitized image with the rasterized second component color plate to provide a second encoded component color plate with second plate image elements having the second rasterization frequency that is equal to or a multiple of the second decoder lens frequency and a second encoded latent image embedded therein, the second encoded latent image being decodable by a decoding lens configured with the second decoder lens frequency so as to reveal the second digitized input image when the second encoded component color plate is viewed through the second decoding lens; and

merging the second encoded component color plate with the first encoded component color plate and the at least one of the other component color plates to form a second output color image.